Traditional stepper motor control system usually choose control unit in the composition of the hardware circuit, circuit clutter is not easy to complete. Explored in this article, based on single-chip stepper motor control method, short circuit, completed the software for all kinds of motor operation, reduces the hardware capital and improve the control flexibility. With the development of microelectronics technology and accounting machine technology, stepping motor is widely used in electric toys, such as the printer cost products and CNC lathe, medical equipment, such as mechanical and electrical products for discussion of stepping motor control system, to improve the control accuracy and response speed and saving money is very important. 1 all stepping motor control system planning and step motor control system can complete the stepper motor speed, rotating moment (0s-9999s）Artificially set, and take positive &negative two rotation method. The human-computer interaction interface, together with a brief are more simple operation. This system consists of two parts of hardware system and software system. Hardware planning by the single chip microcomputer minimum system, power supply module, keyboard control module, module; Software program contains keyboard handling, step motor pulse manifestation module, calculation module, and speed control procedures, at the end of finish rolling direction of the stepper motor, rolling moment control, and the stepping motor of rolling speed, rolling residual always show appeared in the module, as shown in figure 1. Which software program to choose according to the C language of structured programming method, is compiled in KeilC51 integrated compile environment, clear structure, has the extremely good readability and portability. 1 stepper motor control system hardware plan of this system through AT89S51 IO port output sequence of square wave to control of step motor, use 4 * 4 keyboard with the running status of the stepper motor Settings, and USES graphic LCD 12864 motor rotation time, speed and other information, as shown in figure 2. Microcontroller choose 12 MHZ crystal vibration, MCU (P1, P2 mouth pull up resistors have built-in, not external demand, use it to control determinant 4 * 4 keyboard and 12864 graphics LCD, can make the schematic diagram is more concise, but also reduce the capital, and therefore P1 mouth used to connect the determinant keyboard, 4 * 4 P2 mouth appeared to send 12864 graphic LCD data, determinant 4 * 4 keyboard for stepper motor direction, time and speed control and setting. P0 mouth to 12864 graphic LCD input three can signal to operating liquid crystal appeared normal. P3 mouth due to the internal pull-up resistor, with four pins to the output of stepping motor control signal to the stepper motor drive, drive motor. Driving a stepper motor drive circuit is provided by the stepping motor itself, thus there is no this schematic diagram. 1. 2 stepper motor control system software planning step motor control system, in addition to the necessary quality hardware, good software system handle more demand. Thus planning it necessary to give full consideration to all the stability and function of the system, to ensure the stable operation of the system. Program first define each port of the MCU, and then define stepper motor driver function (Concluded that stepper motor operation tempo)； Define manifest LCD screen fixed word coding array; Define the initialization function appeared on the screen and the step motor function default; First define shape LCD sends data instructions; First appeared on the screen left screen to write and then write the right screen data; Then write write data set address; Then set the left panel, the right panel write data start address; Send the screen instructions. Main function start first appeared to the fixed Chinese character coding address to looming in the address, and then the main function into the circulation after query the status of the keys to conclude that stepper motor speed update LCD manifestation data; Send the corresponding data address appeared to the LCD screen, the flow chart shown in figure 3. 2 stepper motor control system based on the single chip microcomputer, make the use of stepper motor more fast, according to the control system of software and hardware connection, not only improved the flexibility of the system, also reduced the capital, the current widely used in all kinds of automation control system. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
